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Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...

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Related Experiment Video

Updated: Jun 7, 2026

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
08:48

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

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Simple autocollimation laser refractometer with highly sensitive, fiber-optic output.

I K Ilev

    Applied Optics
    |November 2, 2010
    PubMed
    Summary
    This summary is machine-generated.

    A novel laser refractometer design offers high accuracy for measuring optical material properties. This fiber-optic instrument precisely determines refractive index and dispersion, validated by experiments.

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    Area of Science:

    • Optics and Photonics
    • Materials Science

    Background:

    • Accurate measurement of optical properties is crucial for material characterization.
    • Existing refractometry methods may have limitations in sensitivity or precision.

    Purpose of the Study:

    • To introduce a simple autocollimation scheme for a laser refractometer.
    • To achieve high-accuracy determination of refractive index and dispersion.

    Main Methods:

    • Utilized a laser refractometer with a single-mode fiber-optic output.
    • Employed an autocollimation technique for precise optical measurements.

    Main Results:

    • Achieved accuracy exceeding 10(-5) in refractive index and dispersion measurements.
    • Experimental and analytical investigations confirmed the instrument's performance.

    Conclusions:

    • The described autocollimation scheme provides a highly sensitive and accurate method for optical material analysis.
    • This fiber-optic laser refractometer is a valuable tool for scientific research and industrial applications.